四年级下册简便运算题目
10个回答
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1。178x101-178=178x(101-1)
=178x100
=17800.
2. 83x102-83x2=83x(102-2)
=83x100
=8300.
3. 17x23-23x7=23x(17-7)
=23x10=230.
4. 35x127-35x16-11x35=35x(127-16-11)
=35x100
=3500.
5. 125x32x8=(125x8)x32
=1000x32
=32000.
6. 25x32x125=(25x4)x(8x125)
=100x1000
=100000.
7. 88x125=8x125+80x125
=1000+10000
=11000.
8. 72x125=9x(8x125)
=9x1000
=9000.
=178x100
=17800.
2. 83x102-83x2=83x(102-2)
=83x100
=8300.
3. 17x23-23x7=23x(17-7)
=23x10=230.
4. 35x127-35x16-11x35=35x(127-16-11)
=35x100
=3500.
5. 125x32x8=(125x8)x32
=1000x32
=32000.
6. 25x32x125=(25x4)x(8x125)
=100x1000
=100000.
7. 88x125=8x125+80x125
=1000+10000
=11000.
8. 72x125=9x(8x125)
=9x1000
=9000.
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展开全部
178×(100-1)
=178×100
=17800
83×(102-2)
=83×100
=8300
(17-7)×23
=10×23
=230
35×(127-16-11)
=35×100
=3500
125×8×32
=1000×32
=32000
(25×4)×(125×8)
=100×1000
=100000
11×(8×125)
=11×1000
=11000
9×(8×125)
=9×1000
=9000
=178×100
=17800
83×(102-2)
=83×100
=8300
(17-7)×23
=10×23
=230
35×(127-16-11)
=35×100
=3500
125×8×32
=1000×32
=32000
(25×4)×(125×8)
=100×1000
=100000
11×(8×125)
=11×1000
=11000
9×(8×125)
=9×1000
=9000
追问
88x125重复一下
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